Hardlock is the world-leading anti-loosening fastener system designed for extreme vibration.
Used globally in mining, rail, quarries, pumps, crushers, conveyors and rotating machinery — now available in South Africa through SupplyFix.
Why Hardlock?
✔ Zero loosening under severe vibration
✔ No need for spring washers, nyloc or threadlock
✔ Lower maintenance & fewer shutdowns
✔ Proven in mining, rail and heavy industry
✔ Reusable and cost-effective long term
✔ Available in all standard sizes
How Hardlock Works
Hardlock uses a main nut + eccentric cone nut
The two nuts lock together by opposing wedge forces, preventing loosening even under extreme vibration.
The system is tested and trusted internationally, outperforming traditional locking methods including:
- Nyloc
- Double-nutting
- Loctite
- Nord-Lock washers
- Spring washers
Industries Using Hardlock
- Mining & quarries
- Crushers & vibrating screens
- Conveyor systems
- Rail infrastructure
- Pump systems
- Water treatment plants
- Municipal & industrial machinery
Hardlock Sizes Available
- M6 to M36
- Standard & fine thread
- Stainless steel available on request
- Bulk orders available
Technical Downloads
- Hardlock Technical Manual
- Product Catalogue
- Test Results & Certification
- Installation Guide
Button: Download Manuals →
Get Pricing on Hardlock Nuts
We supply nationwide from Cape Town and Johannesburg.